Dynamics of Synchronous-Precessing Turborotors With Particular Reference to Balancing. Part 2—Application

[+] Author and Article Information
T. M. Tang

IBM Corporation, San Jose, Calif.

P. R. Trumpler

University of Pennsylvania, Philadelphia, Pa.

J. Appl. Mech 35(1), 25-30 (Mar 01, 1968) (6 pages) doi:10.1115/1.3601169 History: Received April 06, 1967; Online September 14, 2011


The theory of Part 1 is applied to a flexible rotor in which bearing forces are taken as linear functions of journal displacement. The balancing problem is viewed as the optimization (by digital computer) of the angular orientations of all disk masses at rotor assembly, after a rough balance of each mass is achieved and the location of its mass center experimentally established. A “disk sensitivity” criterion is suggested for determining which disk locations show the greatest effect of balance change on rotor performance. Finally, an example of the predicted difference in bearing force for a typical rotor with arbitrary disk orientation, and with improved orientation, is presented.

Copyright © 1968 by ASME
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